LG Watch Sport W280A - Manual (Page 46)

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• Wearing your watch too loosely or moving excessively may cause
inaccurate measurements.
• Escaping light may lead to inaccurate measurements. Do not wear
the device so that it is directly over your wrist bone when taking
measurements.
• Never look directly at the heart rate sensor light as this may damage
your eyes.
Getting Accurate Measurements
Heart rate readings may be inaccurate depending on the conditions
and your surroundings. Follow these steps for more accurate heart rate
readings:
• Never measure your heart rate after smoking or drinking alcohol.
Smoking and/or alcohol can affect your heart rate.
• Never take heart rate measurements at low temperatures. Keep
yourself warm when you measure your heart rate.
• Users with thin wrists may find their heart rate measurements are
inaccurate.
• When measuring your pulse for workout purposes, take the
measurement while seated and relaxed before exercise, then proceed
with your workout.
• If the measurement significantly differs from predicted values, relax
and measure again in 30 minutes.
• Confirm your pulse by taking repeated measurements (about 5
times).
• If you speak, yawn, or breathe deeply during the measurement, you
may see inaccurate values.
• Your circulation, blood pressure, or skin condition can affect the light
reflection process and may lead to inaccurate measurements.
• If light reflection is blocked by body hair or other items, you may
obtain inaccurate measurements.